Improve inheritance support in the CEF API (issue #1623).

- Support single parent inheritance in CEF API classes.
- Support non-virtual inheritance in CEF API classes.
- Support translation of CEF API sub-directories.
- Add test sub-directories for testing-only functionality that will be
  available to unit tests but not exposed via the binary distribution.
- Add unit tests for the translator tool.
- Fix parsing of template parameter types that include commas.

libcef_dll/ctocpp/end_tracing_callback_ctocpp.cc

@@ -17,7 +17,8 @@
 
 void CefEndTracingCallbackCToCpp::OnEndTracingComplete(
     const CefString& tracing_file) {
-  if (CEF_MEMBER_MISSING(struct_, on_end_tracing_complete))
+  cef_end_tracing_callback_t* _struct = GetStruct();
+  if (CEF_MEMBER_MISSING(_struct, on_end_tracing_complete))
     return;
 
   // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
@@ -28,13 +29,28 @@ void CefEndTracingCallbackCToCpp::OnEndTracingComplete(
     return;
 
   // Execute
-  struct_->on_end_tracing_complete(struct_,
+  _struct->on_end_tracing_complete(_struct,
       tracing_file.GetStruct());
 }
 
 
+// CONSTRUCTOR - Do not edit by hand.
+
+CefEndTracingCallbackCToCpp::CefEndTracingCallbackCToCpp() {
+}
+
+template<> cef_end_tracing_callback_t* CefCToCpp<CefEndTracingCallbackCToCpp,
+    CefEndTracingCallback, cef_end_tracing_callback_t>::UnwrapDerived(
+    CefWrapperType type, CefEndTracingCallback* c) {
+  NOTREACHED() << "Unexpected class type: " << type;
+  return NULL;
+}
+
 #ifndef NDEBUG
 template<> base::AtomicRefCount CefCToCpp<CefEndTracingCallbackCToCpp,
     CefEndTracingCallback, cef_end_tracing_callback_t>::DebugObjCt = 0;
 #endif
 
+template<> CefWrapperType CefCToCpp<CefEndTracingCallbackCToCpp,
+    CefEndTracingCallback, cef_end_tracing_callback_t>::kWrapperType =
+    WT_END_TRACING_CALLBACK;